I'll be sifting you'll be sifting she'll be sifting we'll be sifting you'll be sifting they'll be sifting
Perfect
I'll have sifted you'll have sifted she'll have sifted we'll have sifted you'll have sifted they'll have sifted
V-ing perfect
I'll have been sifting you'll have been sifting she'll have been sifting we'll have been sifting you'll have been sifting they'll have been sifting
Negation
Simple form
I shan't sift you shan't sift she shan't sift we shan't sift you shan't sift they shan't sift
V-ing form
I shan't be sifting you shan't be sifting she shan't be sifting we shan't be sifting you shan't be sifting they shan't be sifting
Perfect
I shan't have sifted you shan't have sifted she shan't have sifted we shan't have sifted you shan't have sifted they shan't have sifted
V-ing perfect
I shan't have been sifting you shan't have been sifting she shan't have been sifting we shan't have been sifting you shan't have been sifting they shan't have been sifting
Interrogative form
Simple form
shall I sift? shall you sift? shall she sift? shall we sift? shall you sift? shall they sift?
V-ing form
shall I be sifting? shall you be sifting? shall she be sifting? shall we be sifting? shall you be sifting? shall they be sifting?
Perfect
shall I have sifted? shall you have sifted? shall she have sifted? shall we have sifted? shall you have sifted? shall they have sifted?
V-ing perfect
shall I have been sifting? shall you have been sifting? shall she have been sifting? shall we have been sifting? shall you have been sifting? shall they have been sifting?
Interro-negative form
Simple form
shan't I sift? shan't you sift? shan't she sift? shan't we sift? shan't you sift? shan't they sift?
V-ing form
shan't I be sifting? shan't you be sifting? shan't she be sifting? shan't we be sifting? shan't you be sifting? shan't they be sifting?
Perfect
shan't I have sifted? shan't you have sifted? shan't she have sifted? shan't we have sifted? shan't you have sifted? shan't they have sifted?
V-ing perfect
shan't I have been sifting? shan't you have been sifting? shan't she have been sifting? shan't we have been sifting? shan't you have been sifting? shan't they have been sifting?